<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<!--background-position：参照尺寸为背景图片定位区域的大小减去背景图片的大小-->  
		<style type="text/css">
			body{
				background-image: url(../tg.png);
				background-repeat:no-repeat ;
				background-attachment: scroll;	
			}
		</style>
	</head>
	<body style="height: 3000px;"></body>
</html>
